Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sucker rod connecting device, sucker rod string and assembly method

A technology of connecting device and sucker rod, applied in the field of oil well lifting, can solve the problems of difficulty in entering the well, small sealing, large upward buoyancy, etc., and achieve the effects of increasing crude oil production speed, reducing load and improving efficiency

Active Publication Date: 2018-11-16
PETROCHINA CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is precisely because the seal of the carbon fiber sucker rod is small (actually smaller than the seal of the well fluid), so that it is subjected to a large upward buoyancy force given by the well fluid during the process of entering the well, which makes it difficult to enter the well

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sucker rod connecting device, sucker rod string and assembly method
  • Sucker rod connecting device, sucker rod string and assembly method
  • Sucker rod connecting device, sucker rod string and assembly method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a sucker rod connecting device, a sucker rod string and an assembly method. The sucker rod connecting device comprises a first connecting section for connecting with a connecting steel sucker rod, a second connecting section connected with the connecting section and a wedge-shaped block disposed in a wedge-shaped passage. The first connecting section is provided with a penetrating passage. The second connecting section is provided with the wedge-shaped passage, and the cross-sectional area of the wedge-shaped passage is gradually increased from top to bottom. The wedge-shaped block is provided with a wedge-shaped surface matched with the inner wall of the wedge-shaped passage and a vertical surface opposite to the wedge-shaped surface, and the wedge-shaped surface isattached to the inner wall of the wedge-shaped passage. The vertical surface is used for extruding and contacting with the outer wall of a carbon fiber sucker rod in an ejecting mode. The sucker rodstring has less weight than a steel sucker rod of the same length, so that the load of a pumping unit is reduced, the carbon fiber sucker rod is enabled to be free from the limitation of the buoyancyof well fluid, and it is ensured that the carbon fiber sucker rod is lowered into a well smoothly.

Description

technical field [0001] The invention relates to the field of oil well lifting, in particular to a sucker rod connection device, a sucker rod string and an assembly method. Background technique [0002] The statements in this section only provide background information related to the present disclosure and may not constitute prior art. [0003] Traditional sucker rods are mainly made of steel, which is heavy. As the depth of the oil well increases, the length and weight of the steel sucker rod increase, thereby increasing the load on the pumping unit. In this way, when the maximum load of the pumping unit is constant, the loadable weight of the pumping unit is constant, that is, the length of the steel sucker rod cannot be extended without limit, thereby limiting the pumping depth of the oil well pump, and further improving the pumping capacity of the oil well pump. Efficiency has a negative effect. [0004] In view of this, the carbon fiber sucker rod can better solve the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/02E21B17/00
CPCE21B17/00E21B17/02
Inventor 王书慧吴非罗恩勇张曦宇柳盛森刘冬雷李峻宇赵长亮邓森文管九洲
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com